package com.mmall.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.google.common.collect.Lists;
import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.util.MD5Util;
import com.mmall.util.RedisShardedPoolUtil;
import com.mmall.vo.UserVo;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.UUID;

/**
 * @ClassName: UserServiceImpl
 * @Title: mmall
 * @Package: com.mmall.service.impl
 * @Description:
 * @author: liuqingsong
 * @E-mail: lqs_email@163.com
 * @version: 创建时间: 2019/7/1 15:39
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount=userMapper.checkUsername(username);
        if (resultCount==0){
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        //MD5加密
        String md5Password=MD5Util.MD5EncodeUtf8(password);

        User user=userMapper.selectLogin(username,md5Password);
        if (user==null){
            return ServerResponse.createByErrorMessage("密码错误");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登录成功",user);
    }

    @Override
    public ServerResponse<String> register(User user){
        ServerResponse validResponse=this.checkValid(user.getUsername(),Const.USERNAME);
        if(!validResponse.isSuccess()){
            return validResponse;
        }
        validResponse=this.checkValid(user.getEmail(),Const.EMAIL);
        if (!validResponse.isSuccess()){
            return validResponse;
        }

        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

        int resultCount=userMapper.insert(user);
        if (resultCount == 0) { //resultCount代表生效的行数
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    @Override
    public ServerResponse<String> checkValid(String str,String type){
        if(StringUtils.isNotBlank(type)){
            //开始校验
            if(Const.USERNAME.equals(type)){
                int resultCount=userMapper.checkUsername(str);
                if (resultCount>0){
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if (Const.EMAIL.equals(type)){
                int resultCount=userMapper.checkEmail(str);
                if (resultCount>0){
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }

        }else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    @Override
    public ServerResponse<String> selectQuestion(String username){
        ServerResponse validResponse=this.checkValid(username,Const.USERNAME);
        if(validResponse.isSuccess()){
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question=userMapper.selectQuestionByUsername(username);
        if (StringUtils.isNotBlank(question)){
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    @Override
    public ServerResponse<String> checkAnswer(String username,String question,String answer){
        int resultCount=userMapper.checkAnswer(username,question,answer);
        if (resultCount>0){
            //说明问题及问题答案是这个用户的，并且是正确的
            String forgetToken= UUID.randomUUID().toString();
//            TokenCache.setKey(TokenCache.TOKEN_PREFIX+username,forgetToken);
            RedisShardedPoolUtil.setEx(Const.TOKEN_PREFIX+username,forgetToken,60*60*12);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }

    @Override
    public ServerResponse<String> forgetResetPassword(String username,String passwordNew,String forgetToken){
        if (StringUtils.isBlank(forgetToken)){
            return ServerResponse.createByErrorMessage("参数错误，token需要传递");
        }
        ServerResponse validResponse=this.checkValid(username,Const.USERNAME);
        if(validResponse.isSuccess()){
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
//        String token=TokenCache.getKey(TokenCache.TOKEN_PREFIX+username);
        String token= RedisShardedPoolUtil.get(Const.TOKEN_PREFIX+username);
        if (StringUtils.isBlank(token)){
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }

        if (StringUtils.equals(forgetToken,token)){
            String md5Password=MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount=userMapper.updatePasswordByUsername(username,md5Password);
            if (rowCount>0){
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        }else {
            return ServerResponse.createByErrorMessage("token错误，请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }

    @Override
    public ServerResponse<String> resetPassword(String passwordOld,String passwordNew,User user){
        //防止横向越权，要校验一下这个用户的旧密码，一定要指定是这个用户.因为我们会查询一个count(1),如果不指定id,那么结果就是true即count>0
        int resultCount=userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld),user.getId());
        if (resultCount==0){
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount=userMapper.updateByPrimaryKeySelective(user);
        if (updateCount>0){
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }

    @Override
    public ServerResponse<User> updateInformation(User user){
        //username是不能被更新的
        //email也是要进行校验，校验新的email是不是已经存在，若已存在，则不能是我们当前的这个用户的.
        int resultCount=userMapper.checkEmailByUserId(user.getEmail(),user.getId());
        if (resultCount>0){
            return ServerResponse.createByErrorMessage("email已经存在，请更换email再尝试更新");
        }
        User updateUser=new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount=userMapper.updateByPrimaryKeySelective(updateUser);
        if (updateCount>0){
            return ServerResponse.createBySuccess("更新个人信息成功",updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    @Override
    public ServerResponse<User> getInformation(Integer userId){
        User user=userMapper.selectByPrimaryKey(userId);
        if (user==null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }

    //backend

    /**
     * 校验是否是管理员
     * @param user
     * @return
     */
    @Override
    public ServerResponse checkAdminRole(User user){
        if (user!=null&&user.getRole().intValue()==Const.Role.ROLE_ADMIN){
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }

    @Override
    public ServerResponse<PageInfo> getUserList(int pageNum,int pageSize){
        //pageHelper通过aop植入,获取动态分页
        //startPage--记录开始
        PageHelper.startPage(pageNum,pageSize);
        //填充自己的sql查询逻辑
        List<User> userList=userMapper.selectList();
        List<UserVo> userVoList=assembleUserVoList(userList);
        //pageHelper--收尾
        PageInfo pageResult=new PageInfo(userList);
        pageResult.setList(userVoList);
        return ServerResponse.createBySuccess(pageResult);
    }

    public List<UserVo> assembleUserVoList(List<User> userList){
        List<UserVo> userVoList= Lists.newArrayList();
        for (User user:userList) {
            UserVo userVo=new UserVo();
            userVo.setId(user.getId());
            userVo.setUsername(user.getUsername());
            userVo.setPassword(StringUtils.EMPTY);
            userVo.setEmail(user.getEmail());
            userVo.setPhone(user.getPhone());
            userVo.setQuestion(user.getQuestion());
            userVo.setAnswer(user.getAnswer());
            userVo.setRole(user.getRole());
            userVo.setCreateTime(user.getCreateTime());
            userVo.setUpdateTime(user.getUpdateTime());
            userVoList.add(userVo);
        }
        return userVoList;
    }

}
